It's really going to depend on a number of factors but ultimately personal preference. The fact that you have a shower is great, and what prevents a lot of people from considering bicycle commuting over moderate distances.

Ten miles really is not that big of a deal. I live in Chicago and commute 4 miles each way and it only takes 20 minutes, faster than if I were to drive.

The challenge with what you are considering though will probably be the fact you are in Utah. Consider the topography and if there is a elevation variation of over 1000ft you are really going to have consider your physical fitness and the extra time it is going to take to plow up those hills. You probably aren't looking at something impossible though, even if you are out of shape right now so don't let that stop you.

Overall though you are looking at only 13 miles. Chances are you will be more than fine and that distance would even be enjoyable. Make sure you invest in a good commuter bike that will treat you right.

Clay pebbles are just used as physical support for the plant and roots. As the other guy just said, they provide no nutritional value. Nutrients are supposed to come solely from the water.

Also - no the clay should not really be submerged in water. They really just need to be kind of wet until the roots grow out of them. It's hard to keep a completely submerged pot oxygenated - which brings me to my next point about the mold.

Unless the clay is significantly dirty or contaminated, it's unlikely they are the source of the mold. Is there mold build-up in your res too? Chances are your water is stagnating and you need oxygenated it. What kind of set up do you have?

I got smashed by a Mercedes back in March. Definitely took me a couple months of getting over the psychological trauma to feel comfortable riding again. I almost was ready to give it up entirely. I eventually fixed my bike (and my body) back up and I'm glad I'm riding again although I am definitely still shook up.

Hope it all works out for you, id guess that you will eventually be OK too